Details

Track your efforts to step up a level with CatEye's sleek, lightweight, race-ready Stealth evo+. This wireless computer uses ANT+ technology to display the speed, cadence, heart rate, and left/right leg power percentages, all measured from your favorite ANT+ device (sold separately). Use it mid-ride to stay on pace, then download your data afterwards for home analysis and find out where you have room for improvement. The Stealth evo+ is GPS-equipped so you can scrutinize your ride with your preferred training and mapping services. An optional auto start/stop keeps your mind on the road instead of on your computer every time you come to a red light. Other key features include a programmable full time backlight, programmable odometer, a USB-rechargeable Li-ion battery, and altimeter. Declutter your bars and get the most out of all your rides with the Stealth evo+.

ANT+ is a wireless technology that allows your monitoring device to seamlessly communicate with other ANT+ products such as speed sensors, heart rate monitors, power meters, and foot pods that track running/walking progress.

CatEye has a winner with this device.
For the most part this is a 1 button device with the exception of turning the device on and off or starting/pausing a new ride.
The device is ANT+ compatible, which means that it will support any ANT+ Heart rate monitor, Cadence/Speed Sensor, and Power Meter.
The Device also supports GPS, and at the lowest measurement polls updates every second.
This product is essentially CatEye's version of the Garmin 500/510.
When comparing it to the Garmin 510 it has the following drawbacks:
1)No GLONASS support. This means that time to GPS fix takes longer (as long as a Garmin 500)
2) No stored route functionality
3)No Bluetooth support so no live activity plotting
4) Slower polling rate.
Bottom line:
If you like CatEye's LCD display, and don't mind waiting for sync, go for it, its a great 1st computer.